Study on the local corrosion behaviour and mechanism of bogie steel welded joints

Song, Junjie; Li, Zhao-Liang; Xiao, Kui; Luo, Hong; Chen, Junhang; Yu, Wei; Zhang, Xin; Dong, Chaofang

doi:10.1016/j.corsci.2022.110709

Cited by 20 publications

(4 citation statements)

References 54 publications

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“…The local corrosion behavior and mechanism of the welded joints were studied. The results showed that the corrosion was caused by the distribution of microstructure defects in different areas of the weld [18]. The heat-affected zone of the joint was found to be the most sensitized to corrosion [19].…”

Section: Free Corrosion Potential Of Welded Jointsmentioning

confidence: 97%

Corrosion Performance of Welded Joints for E40 Marine Steel

Li,

Wu,

Sun

2023

Metals

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Marine steel requires excellent toughness and corrosion resistance in a low-temperature seawater environment. In this study, corrosion tests on E40 steel were performed, including electrochemical testing of the weld metal and heat-affected zone, dynamic corrosion testing in a simulated seawater environment, and the analysis and comparison of results obtained using different methods. The corrosion resistance of E40 was determined by measuring the saturation current density of the anodic dissolution of the steel in a corrosive medium by an electrochemical method. Under laboratory conditions, the corrosion resistance was investigated under simulated seawater. The results showed that regions with uneven microhardness corresponded to the inhomogeneity of the corrosion potential, with measured fluctuations of up to 40 mV. Nanoscale corrosive–aggressive non-metallic inclusions served as a substrate for the deposition of titanium and niobium carbonitrides, thereby weakening the corrosion resistance. The corrosion rate of the base metal was 1.16–1.64 mm/year, which was slightly higher than that of the heat-affected zone. The influence of deposition on the corrosion performance of welded joints under different deoxygenation processes was studied, and the deposition composition was controlled by a deoxygenation process to improve the corrosion resistance of the steel plate.

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Section: Free Corrosion Potential Of Welded Jointsmentioning

confidence: 97%

Corrosion Performance of Welded Joints for E40 Marine Steel

Li,

Wu,

Sun

2023

Metals

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“…The real physical meaning of the surface potential E is actually the relative volt potential difference between the surface of the metal sample and the tip of the test probe by SKPFM. The relationship between it and the free energy of the system is [24,25]:…”

Section: Materials Microstructure Potential Analysismentioning

confidence: 99%

Mechanism of Corrosion Behavior between Pb-Rich Phase and Cu-Rich Structure of High Sn-Pb Bronze Alloy in Neutral Salt Spray Environment

wang,

Zhou,

Song

et al. 2023

Preprint

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“…Because of the adverse effects of the multiphase structure, they are susceptible to corrosion during service. This is because micro-galvanic couples are easily formed between ferrite and cementite on the surface of ferrite-pearlite steels in corrosive solutions, where cementite as the cathode is continuously accumulated leading to the enhanced corrosion (Wang et al , 2021; Liu et al , 2021; Gu et al , 2023; Hao et al , 2021; Song et al , 2022; Anijdan et al , 2022; Xia et al , 2022). Therefore, weakening the micro-galvanic corrosion will be beneficial for improving the corrosion resistance of the ferrite-pearlite steel, which is important for its engineering application in the marine environment.…”

Section: Introductionmentioning

confidence: 99%

The microstructure and corrosion behavior of Cr-containing ferrite-pearlite steels in an acidic environment

Hao

Wang

Guo

et al. 2023

ACMM

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Purpose The poor corrosion resistance of the ferrite-pearlite steel limits its application in marine engineering because of the enhanced galvanic effect caused by continuously accumulated cementite. Cr as one principal alloying element is commonly used to improve the corrosion resistance of steels. This paper aims to study the effect of Cr on corrosion behaviors of ferrite-pearlite steels in an acidic environment. Design/methodology/approach The tested steels were immersed in a simulated solution of 10 Wt.% NaCl with pH 0.85 for 72 h to evaluate the corrosion rate. After the immersion test, the corrosion morphologies and products were tested by scanning electron microscopy, energy dispersive X-ray analysis and X-ray diffraction. Meanwhile, an electrochemical workstation was used to study the electrochemical behaviors of samples. Findings At the initial corrosion stage, the corrosion rate increased in the sequence of Cr0, Cr0.5 and Cr1 steels, which was because of the competitive effect between the area ratio and the driving force caused by alloyed Cr. However, Cr1 steel exhibited the best corrosion resistance after a 72-h immersion test. This was because the alloyed Cr promoted the formation of protective Fe2O3 and FeCr2O4, which suppressed the preferential dissolution of ferrite and, thus, reduced the accumulation rate of carbides, resulting in the weakened galvanic corrosion. Originality/value This paper reports the role that Cr plays in the galvanic corrosion of ferrite-pearlite steels, which is important for the engineering application of ferrite-pearlite steels in marine environment.

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Study on the local corrosion behaviour and mechanism of bogie steel welded joints

Cited by 20 publications

References 54 publications

Corrosion Performance of Welded Joints for E40 Marine Steel

Corrosion Performance of Welded Joints for E40 Marine Steel

Mechanism of Corrosion Behavior between Pb-Rich Phase and Cu-Rich Structure of High Sn-Pb Bronze Alloy in Neutral Salt Spray Environment

The microstructure and corrosion behavior of Cr-containing ferrite-pearlite steels in an acidic environment

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